Production of He-4 and (4)<(He) over bar> in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC


Acharya S., Adamova D., Adolfsson J., Aggarwal M. M., Rinella G. A., Agnello M., ...More

NUCLEAR PHYSICS A, vol.971, pp.1-20, 2018 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 971
  • Publication Date: 2018
  • Doi Number: 10.1016/j.nuclphysa.2017.12.004
  • Journal Name: NUCLEAR PHYSICS A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-20
  • Keywords: Pb-Pb collisions, ALICE detector, LHC, Anti-nuclei, HEAVY-ION COLLISIONS, ENERGY PROTON-BOMBARDMENT, ROOT-S(NN)=2.76 TEV, HADRON YIELDS, PHASE-DIAGRAM, MATTER, COALESCENCE, DEUTERONS, NUCLEUS, MODEL
  • Bursa Uludag University Affiliated: No

Abstract

Results on the production of He-4 and (4)<(He) over bar> nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar < 1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4<(He) over bar> = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)<(He) over bar>/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.